Audiogalaxy compares file paths in the iTunes XML to the paths in Audiogalaxy, so make sure that the paths in iTunes/m3u file match the files in Audiogalaxy.
Examples of things that don't work:
- You're pointing to the wrong/outdated iTunes XML file from Audiogalaxy. You can change this from Audiogalaxy's Music Folders/Preferences dialog. It's a file called "iTunes Music Library.xml" usually in the same folder where you store your iTunes music.
- iTunes/m3u points to music in a directory which you haven't selected in Audiogalaxy.
- The m3u contains relative paths to files. Only absolute paths are supported
- If you have your music on an external drive/network share, then iTunes/m3u might refer to them as \\server\path\file.mp3, but in Audiogalaxy you could have the drive mapped to a drive letter, such as D:\path\file.mp3. The paths need to be consistent for songs to picked up
- iTunes might have made copies of all your music, which resides in some sub-folder of iTunes, whereas Audiogalaxy points to the original music file. Hence the file paths are different.
- Your m3u file must contain #EXTM3U as the first line, and must be encoded using ANSI encoding.